/Engine/Source/Runtime/RHI/Public/DynamicRHI.h
Copies the contents of one buffer to another buffer. They must have identical sizes.
void RHICopyBuffer ( [FRHIBuffer](API\Runtime\RHI\FRHIBuffer) * SourceBuffer, [FRHIBuffer](API\Runtime\RHI\FRHIBuffer) * DestBuffer )